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When to Plant Lemongrass in Iberville Parish, LA

Lemongrass is a tropical grass with a strong citrus aroma used extensively in Southeast Asian cuisine. The swollen stem bases are the most flavorful part.

Iberville Parish, Louisiana is in USDA Zone 9a. The average last spring frost is February 14 and the first fall frost is December 5, giving you a growing season of approximately 294 days.

At an elevation of 464 feet, Iberville Parish receives approximately 59 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 103ยฐF, so Lemongrass may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring โ€” great for early planting โ€” but Lemongrass will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Lemongrass root diseases.

Iberville Parish, LA (Zone 9a) Year-round
294 days
Last Spring Frost February 14
294 growing days
First Fall Frost December 5

Iberville Parish Soil Profile

Soil Type

Sandy Loam

Soil pH

4.8-6.2

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (120 days to spare)
Start indoors: Dec 25 Transplant: Feb 12 🍅 Harvest: Apr 30 – Jul 30
Recommended (50%) ✓ Fits season (119 days to spare)
Start indoors: Jan 3 Transplant: Feb 21 🍅 Harvest: May 9 – Aug 8
Safe Start (90%) ✓ Fits season (109 days to spare)
Start indoors: Jan 28 Transplant: Mar 18 🍅 Harvest: Jun 3 – Sep 2

Percentages indicate frost risk at transplant. The 70% safe window means there is a 30% chance of frost after transplant — suitable for cold-hardy crops or gardeners with frost protection. The 90% safe window is best for tender plants.

Plant Water Budget

Plant needs
1.5″/week
Rainfall provides
0.8″/week
You supply
0.2″/week
Watering frequency Only during dry spells
Season total 551 gal / 100 sq ft
Lemongrass needs ~2,657 GDD — county provides 8,038 GDD Excellent fit

Lemongrass Planting Timeline โ€” Iberville Parish, LA

Lemongrass Planting Calendar

Activity When Date Range
Start Indoors January 3 Jan 3 โ€“ Jan 17
Transplant Outdoors February 21 Feb 21 โ€“ Mar 7
Direct Sow February 21 Feb 21 โ€“ Mar 14
Harvest May 9 May 9 โ€“ Aug 8

Plant 0.5" deep ยท 8" apart ยท Rows 12" apart

Month-by-Month Timeline

MonthActivities
January Start Indoors
February Transplant Outdoors Direct Sow
March Transplant Outdoors Direct Sow
April โ€”
May Harvest
June Harvest
July Harvest
August Harvest
September โ€”
October โ€”
November โ€”
December โ€”

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

High โ€” keep soil consistently moist

Days to Maturity

75โ€“120 days

Soil pH

5.5 โ€“ 7.5

USDA Zone

Zone 9a

Growing Season

294 days

Growing Tips for Iberville Parish

Start from divisions or store-bought stalks rooted in water. Grow in rich, moist soil with full sun. In cold climates, grow in containers and overwinter indoors.

Companion Planting

Good Companions

Level Up Your Garden

Frequently Asked Questions

When should I plant Lemongrass in Iberville Parish, LA?

Iberville Parish is in Zone 9a with an average last frost of February 14. Plan your Lemongrass planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Iberville Parish, LA?

Iberville Parish, Louisiana is in USDA Hardiness Zone 9a. The average last spring frost is February 14 and first fall frost is December 5.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Iberville Parish gardeners in Zone 9a organize planting dates, track what's growing, and never miss a planting window.

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Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Iberville Parish, LA. Local conditions may vary. Last updated: April 2026.